<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    /*.wrap {*/
    /*  width: 200px;*/
    /*  height: 200px;*/
    /*  !*background-color: #6593ee;*!*/
    /*}*/
    .box1 {
      /*float: left;*/      overflow: hidden;

      width: 100px;
      height: 100px;
      background-color: #07487b;
      opacity: 20%;
    }
    .box2 {
      overflow: hidden;
      float: left;
      width: 50px;
      height: 50px;
      background-color: #f62636;
    }
    .box3 {
      width: 50px;
      height: 50px;
      background-color: #4de53f;
    }
    .box4 {
      width: 50px;
      height: 50px;
      background-color: #f5db6c;
    }
  </style>
</head>
<body>
  <div class="wrap">
    <div class="box1">123</div>
    <div class="box2">456</div>
    <div class="box3">456</div>
    <div class="box4">456</div>
  </div>
</body>
</html>
